Apocalypse occured when the moon suddenly crashed and fused with Earth. The planet's mass drastically increased and so does gravity. New stronger species appeared. Aika Inoue, a optimistic mechanical expert. She has shoulder-lengh messy bright red hair and amber eyes. She wears a brown coat. Aika's shelter can transform into a small chip, ready to be deposit anywhere. That grants her freedom to travel anywhere without worrying to find places to sleep. She is tolerant, carefree, yet not naive.